Abstract
Micro droplet formation has been performed using a small rod. When the rod is dipped in the liquid and pulled up, a droplet is formed at the end of the rod. In this study, the droplet formation was carried out under the thermocapillary flow by heating the rod. The droplet volume and its reproducibility were measured. As the result, the droplet volume was reduced with increasing the Marangoni number. In comparison to without temperature difference, the maximum volume reduction was about 25%. The droplet volume was reproducible with an uncertainty of 2%. This result indicates that the effect of the thermocapillarity can control the micro droplet volume with a high degree of accuracy.
